Preheat oven to 350º F.

In a large pot of boiling water, cook fussili; drain and set aside.

Remove casings from sausage and brown in a large sauté pan until cooked thoroughly and crumbly.

Stir in sweetpotatoes, red pepper, scallions and garlic and continue to cook another 5 minutes until vegetables are just tender.

Add canned tomatoes, heavy cream, salt and white pepper; bring to a boil to thicken cream.

Combine with cooked pasta; spoon into a casserole.

Bake in oven until golden brown on top, about 30 minutes.